Install libproc-processtable-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libproc-processtable-perl
Description:
Perl library for accessing process table information
Proc::ProcessTable attempts to unify the interfaces to Unix process table information, without having to run a ps subprocess from within a perl or shell script and parse the output.
Homepage: https://metacpan.org/release/Proc-ProcessTable
Version: 0.55-1
Section: universe/perl